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Faults and Mountains . Fault- a break along which the rock on either side moves. Hanging wall- the rock on the side of the fault that is on top of the fault (in non-vertical faults). Footwall- is the rock under the fault (in non-vertical faults). Vocabulary.

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Presentation Transcript
vocabulary

Fault- a break along which the rock on either side moves.

Hanging wall- the rock on the side of the fault that is on top of the fault (in non-vertical faults).

Footwall- is the rock under the fault (in non-vertical faults).

Vocabulary
plate tectonics and mountains

Collisions between Oceanic and Continental Crust

When oceanic crust subducts under the continental crust there is such a large deformation of rock that high mountains are formed.

Subduction of oceanic crust causing melting at the subduction zone and the magma may erupt to form volcanic mountains.

When the oceanic crust subducts pieces called terranes may be scraped off and form mountains.

Plate tectonics and mountains
plate tectonics and mountains1

Collisions Between Oceanic Crust and Oceanic Crust

Volcanoes often form where two oceanic crusts collide

Plate tectonics and mountains

The Mariana Islands

plate tectonics and mountains2

Collisions Between Continents

When two continental plates collide the continental crust of either continent does not subduct.

Because of this the crust is pushed UP between the two continents to form mountains like the Himalayas (where Mt Everest is).

Plate tectonics and mountains